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- HR_8799_c abstract "HR 8799 c is an extrasolar planet located approximately 129 light-years away in the constellation of Pegasus, orbiting the 6th magnitude Lambda Boötis star HR 8799. This planet has a mass between 5 and 10 Jupiter masses and a radius from 20 to 30% larger than Jupiter's. It orbits at 38 AU from HR 8799 with an unknown eccentricity and a period of 190 years; it is the 2nd planet discovered in the HR 8799 system. Along with two other planets orbiting HR 8799, this planet was discovered on November 13, 2008 by Marois et al., using the Keck and the Gemini observatories in Hawaii. These planets were discovered using the direct imaging technique. In January 2010, HR 8799 c became the 3rd exoplanet to have a portion of its spectrum directly observed (following 2M1207b and 1RXS J1609b), confirming the feasibility of direct spectrographic studies of exoplanets.".
- HR_8799_c thumbnail Exoplanet_Comparison_HR_8799_c.png?width=300.
- HR_8799_c wikiPageExternalLink planete.php?etoile=HR+8799&planete=c.
- HR_8799_c wikiPageID "20239636".
- HR_8799_c wikiPageRevisionID "591721561".
- HR_8799_c appMag "5.964".
- HR_8799_c class "kA5 hF0 mA5 V; λ Boo".
- HR_8799_c constell Pegasus_(constellation).
- HR_8799_c density "3.2".
- HR_8799_c discoverers "Marois et al.".
- HR_8799_c discoveryDate "2008-11-13".
- HR_8799_c discoveryMethod Methods_of_detecting_exoplanets.
- HR_8799_c discoverySite "Keck and Geminiobservatories in Hawaii".
- HR_8799_c discoveryStatus "Published".
- HR_8799_c distLy "129".
- HR_8799_c distPc "39".
- HR_8799_c epoch "2008-09-18".
- HR_8799_c hasPhotoCollection HR_8799_c.
- HR_8799_c mass "7".
- HR_8799_c periodYear "~ 190".
- HR_8799_c planet "c".
- HR_8799_c positionAngle "317.06".
- HR_8799_c radius "1.3".
- HR_8799_c semimajor "~ 38".
- HR_8799_c semimajorGm "~ 5600".
- HR_8799_c separation "38".
- HR_8799_c separationMas "964".
- HR_8799_c simbad "HD+218396c".
- HR_8799_c star HR_8799.
- HR_8799_c star "HR+8799".
- HR_8799_c temperature "1090".
- HR_8799_c subject Category:Exoplanets_detected_by_direct_imaging.
- HR_8799_c subject Category:Exoplanets_discovered_in_2008.
- HR_8799_c subject Category:Gas_giants.
- HR_8799_c subject Category:HR_8799.
- HR_8799_c subject Category:Pegasus_(constellation).
- HR_8799_c comment "HR 8799 c is an extrasolar planet located approximately 129 light-years away in the constellation of Pegasus, orbiting the 6th magnitude Lambda Boötis star HR 8799. This planet has a mass between 5 and 10 Jupiter masses and a radius from 20 to 30% larger than Jupiter's. It orbits at 38 AU from HR 8799 with an unknown eccentricity and a period of 190 years; it is the 2nd planet discovered in the HR 8799 system.".
- HR_8799_c label "HR 8799 c".
- HR_8799_c label "HR 8799 c".
- HR_8799_c label "HR 8799 c".
- HR_8799_c label "HR 8799 c".
- HR_8799_c label "HR 8799 c".
- HR_8799_c label "HR 8799 c".
- HR_8799_c label "HR 8799 c".
- HR_8799_c label "飛馬座V342c".
- HR_8799_c sameAs HR_8799_c.
- HR_8799_c sameAs HR_8799_c.
- HR_8799_c sameAs HR_8799_c.
- HR_8799_c sameAs HR_8799_c.
- HR_8799_c sameAs HR_8799_c.
- HR_8799_c sameAs HR_8799_c.
- HR_8799_c sameAs m.04vwdh3.
- HR_8799_c sameAs Q1335138.
- HR_8799_c sameAs Q1335138.
- HR_8799_c wasDerivedFrom HR_8799_c?oldid=591721561.
- HR_8799_c depiction Exoplanet_Comparison_HR_8799_c.png.
- HR_8799_c isPrimaryTopicOf HR_8799_c.
